
$arr:10px 20px 30px;
.box1{
    margin-top: nth($arr,1);
    margin-left: nth($arr,2);
}

$arr2:left top right bottom;
.box2{
    .#{nth($arr2,2)}{
        color: red;
        margin-#{nth($arr2,1)}: 10px;
    }
}

$obj:("t":"top","l":"left","w":500px);
.box3{
    width: map-get($obj,"w");
    margin-#{map-get($obj,"t")}:20px;
}



